Detachable cap.



A. E. BRONSON.

DETACHABLE CA P.

APPLICATION meo- FEB. 5.- 1917.

Patented Dec. 25, 1917.

. a citizen of the United States, residing at ADELIBERT E. BRONSON, OF CLEVELA ND, OHIO.

DETAGHABLE CA1.

Specification of Letters Patent. Patented Dec. 25,1917.-

Application filed February 5, 1917. Serial No. 146,570.

To all whom it may concern:

Be it known that I' ADELBERT E. Bronson,

Cleveland in the county of Cuyahoga and State of hio, have invented a certainnew and useful Improvement in Detachable Gaps, of which the following is a full, clear, and exact description.

This invention relates to a construction in which a tubular member surrounding the end of a projecting stem, is attached to the said stem in such a manner. as to permit of its read detachability. Speci cally the invention relate to an improvement 1n dust caps for use in connection with tire valves, and the improvement provides a construction which does away with the necessity for screwing the dust cap along the valve stem for a greater or less distance, but provides for the detachability of the dust cap by a simple twist or axial rotation with respect to the valve stem.

A further object of the invention is to provide a construction which will be free from openings or crevices in which mud and snow may lodge, both of which features are decidedly disadvantageous in a construction of the kind herein roposed 7 Generally spea ing, the invention may be said to comprise the elements and combinations thereof set forth in the accompanying claims.

Reference should be had to the accompanying drawings forming a part of this specification in which Figure 1 is an elevation with portions in section ShOW1Ilg:a valve stem with a du t, eap embodying my invention applied thereto; Fig. 2 is an elevation with portions in section of the casing containing certain portions of the invention; Fig.

section showing an assemblage of the ele-.'

ments shown in-Figs. 2 to 4 inclusive;

Referring to the drawings, '1 indicates a tire valve stem of usual construction, and as is well known, the stem 1 is hollow, and within the stem there 'is a valve and valve seat of :which we will give no further de-.

scription. The end ofthe valve stem is closed by a cap 2, and for the purpose of' the valve cap and thatportion flof the va ve stem which ordinarily extends protecti-n what I term a nut5. sleeve-like portion 6, which. is threaded and outside of the rim of the wheel, it iscustoniary to provide a dust cap, whlch inmost instances is threaded upon portio 6f the p,

interior thereof, and 1s screwed upon the threaded valve stem. 1

In the construction herein proposed, "the dust cap or shell 3 is released from itssecurm an by a twist or. turn, impartin axial rotation to theshell 3. The lower end of the dust cap is provided with a plurality of extenslonswhich are indicated at 4, these extensions being substantially equally spa'ced from each other, and upon one edge there of, each projection 4 is beveled'as indicated at 40. i v v i v 1 ,Upon the valve stem '1 there-is secured This nut has axcentral engages wlth the screw threadsupon the outer surface of the valve stem 1. The nut 5 has an outwardly extending flange 7 which is preferably irregular in form, and atit s outer edge engages with the walls of "the" casing 8. This casing is ofthe same irregular shape as the flange or extension 7, and as shown, the casing is hexagonal and the outer edge of thi f flange 7 is also formed hexagonal so that e casing and the nut 5- are not rotatableWr respect to each other, butmay rotate as'a unit upon'the valve stem l.

Thecasing 8 at one end has an inturned flange, or what-1' may te'rm'top portion 9.

fifl' ll p por i n there are formed aseriesof openin 's 10, the openings being substantially equa ly spaced with respect toeach other, and the number of openings corresponding with the number of projections i upon the end of the dust cap. Intermediate the openings 10, the top portion '9 of the casing 8 is formed with embossed portions 11.

The opposite end of the casing 8 has its side walls crimped in, as indicated at .12 in Fig. '1, these crimped in portions engaging with the under side of the flange 7 onthe fill-Q5 to retain it within the-casing. The opening in the casing 8' which is adjacent to the flange 7 of the nut'5 is filled in with a washer 13 of leather or other sui ablematerial. The washer fill's'in'the threaded def pressions, and also tightly engageshj .r:-.1ction, the cramped portions of the casings,

thus completely excludin :wa'te'r and dust. Within the-casing 8 t er'e =is a plate or. I

washerlet. "This plate or Washerleis pro vid'ed with a "plurality of spacedexten'Sions r project-ions 14f, these projections and their spacing corresponding with the num not turn with respect to the casing 8, but is free to slide within the casing.

The plate 14wh'enplaced within the easing, is'so placed that the projections14 come opposite the openings 10 in the casing 8, so as normally to fill these openings completely and prevent the entrance of any dust or water into the inside of the casing.

Surrounding the sleeve 6 of the-nut 5 there isaspring 15. i This spring at one end bears upon the extension? of the nut 5, and at its opposite end bears upon the inner side of the against, the top 9 of the casing and the nut 5 against the crimped in portion 12 of the" casing 8. v

The projections 14? formed upon the plate 14 are at one side thereof, formed with a slanting portion 4" the will be presently explainec As before explained, the cap or tubular member 3 is at its lower portion formedwi'th outwardly extending members 4 which have the beveled portions 4 In attaching the cap to its securing means, the extensions 4 are presented to the openings 10 in the casing 8-, and these extensions 4 are pressed inwardly until they lie beneath the top or cover 9.,of the casing 8, then by giving the shell 3 an axial twist the extensions 4 on the cap come beneath and register with the embossed portions 11 in the cover 9 of the casing, 8.. \Vhen the ortions 4 of the cap are thus engaged by t e embossed portions of the cover of the casing, the cap is held against accidental axial rotation for the projections 4 fit nicely within the embossed portions 11. I I 7 When theportions 4 of the cap are pre sented to the openings 10 and pressed through said openings, the extensions 4 on the cap engagewith the upstanding portions 14 npon the plateior washer 14, and when thegc-ap is pressed inwardly the plate or washer 14 is depressed against the action of the spring 15.,Assoon as the cap is given an axial twist to. bring the extensions 4 of the cap into registry with theembossed portions 11 of the casing 8, the plate 14 is pressed outwardly bythe spring 15 and the extensions orupstanding portions 14 of the plate 14will enter the openings 10 in the' casing and-will fill these openings. It will thus be seenithatthe openings 10 in. the casing will be filledorpluggedup so t speak, at

' alltimes except at the actual insertion or i withdrawing of the cap from holding at i means.

ate or washer 14, thus holding the washer purpose of "which As before explained, the extensions or upstanding portions 14 oi the washer 14 are provided with beveled ends 14", while the 1 extensions 4 of the cap are provided with beveled port-ions 4 These beveled portions upon the'two members just discussed cooperate when it is desired to turn the cap for the purpose of removing the cap from its holding means. As-

the cap is given a otation in a counter clockwise direction, the beveled portions 4 and 14" will engage with each 0tl11,"2l11(l the continued turning of the cap will effecta cam action which will depress the plate 14 and permit the extensions 4 to come opposite the openings 10 in the casing, in which position the cap is disengaged or detached.

Having thus described my invention, what I claim is 1. The combination of astem, a casing upon the said stem, said casing having a cover portion provided with a plurality of spaced openings, a plate within. said casing,

means for resiliently holding said plate against the cover of the casing, said plate beingprov-ided with extensions which project through the openings in the cover, a cap having spaced extensions at the open e'nd thereof, said extensions being adapted to be passed through" the openings in the casing, the extensions engaging the under side of the cover of the casing upon axial rotation of the tubular member, the extensions upon the said plate filling the openings in the cover of the casing when the tubular member is thus rotated.

2. In combination a stem, a casing upon said stem, said casing having a cover-which is provided with a plurality of spaced opcn ings, the portions of the cover intermediate the openings being formed to provide'rein the cover whereby the spring-pressed.

plate may move outward into engagement wlth the inner side of the cover, thereby providing a substantially dust-proof structure.

3. In combination, a stem, a casing mounted upon said stem, said casing having a cover provided with a plurality of spaced openings, the cover intermediate the spaced openings being embossed to provide depressions, a plate within said casing, means for resiliently holding the plate against the cover of the casing, said plate being provided ivith extensions which extend into the openings in the cover of the casing, a t'ubular member having a plurality of spaced e'xtensions at the open end thereof, said ex- L ft-0 96 tensions being adapted to through the ed upon-said stem, said casing having sides which extend at an angle with respect to each other, said casing also having acover provided. with spaced openings therein; a plate within the casing, said plate having sides which correspond with the sides of the casing but is prevented from turning relatively to the casing,.resilient means for holding said plate against the cover of the easing, a cap having extensions at the open end thereof, said extensions-being adapted to be passed through the openings in the-cover of the casing and upon' axial turning of the cap to engage with the inner surface of the cover of the casing.

5. In combination, athreaded'stem, a nut upon said stem, a casing surrounding the nut and in engagement with the nut, said casing having a cover provided with aplurality of spaced openings and a plurality of depressions which are interspaced with respect to the openings, a plate within said casing, said plate having engagement with the caslng which prevents relative turning,

resilient means engaging the plate to hold it,

against the cover of the casing, a cap havin extensions adgacent the open 7 end thereo said extensions being adapted to pass through the openings in the cover, and by an-axial turning engage the depressions in the cover of the casing. I

6. In combination, a threaded stem, a nut upon the. said stem, a casing surrounding the said nut and in engagement therewith, the casing having a cover provided with spaced openings, a plate within said casing, mearis preventing relative rotation between the plate and said cover of the casing, aresilient member normally holding the plate against the cover of the casing, said plate being provided with Xt6I1S1OI1S Wl110 h occupy and extend through the'openings 1n the ued rotation of the cap.

cover of the casing, a cap provided With extensions adjacent its open end,-sa1d extensions being adapted to pass through the openings and upon axial turning of the cap to engage with the under side of the cover of the casing.

7 "In combination, a threaded stem, a nut upon the. said stem, a casing surrounding the nut and engaging the, nut, said casing hav mg a co.ver provided with spaced openings,

'zf'plate within said casing, said plate haw. vlng engagement with the casing which prevents relative turning. a reslhent member normally holding said plate against the cover of the casing, the plate being provided with projections which extend through the openings in the cover, each of the extensions upon the plate being beveled at an end thereof, a cap provided with a plurality of. spaced extensions at the open end thereof, each of said extensions being beveled at an end thereof, theextensions upon the said cap being adapted to pass through the openings in the casing and upon axial turning of the cap to engage-with the inner side 'ofthe cover of'the casing, and upon reverse rotation the beveled portions of the extensions upon the cap and plate en a in to de )ress the )l'ate 11 3011 contin- 8. In'combination, a stern, a casing mounted upon said stem,said casing having sides -which extend' at an angle with respect to each other, said casing also having a cover prov ded with spaced openings therelnpa plate within the casing, said plate having sides which correspond with the sides of the casing, whereby the plate is prevented from .90 relative turning with respect to the casing,

said plate/being provided with extensions which normally occupy the said open'ngs ilu the cover of the casing, resilient mea s for holding said plate against the coverpf the casing, a cap having extensions at the open end thereof, said extensions being adapted to be passed through the openings in the cover of the casing and upon axial turning'of the cap, to engagewith the inner surface of the cover of the casing.

In testimony whereof, I hereunto afiix my signature 1n the presence of two witnesses.

YADELBERT E. BRONSON. 

